Sour cream is widely used in this country and I actually love it but had none for years when I took avoiding lactose quite seriously. I still don’t want to eat lactose but sour and heavy cream are so good, I use little but not zero like before. I never thought about eating it with meat, it suits vegetables better especially legumes so I don’t really need it, I just like to eat some now and then, I gladly eat anything I like alone except spices (not too spicy mustard is fine alone, I did it often as a kid. not too strong vinegar works too but that was more like showing off than pure joy like eating mustard. I love vinegar and it is great with sour cream in some soups or veggie dishes. At least for people like me. I prefer the sourest sour cream I can find. But lemon is too sour for me).
Mint sauce? Sounds interesting and potentially odd but tastes differ, after all. I never use mint in anything and I don’t need sauces most of the time. I have a spicy tomato sauce but it’s more vegetable for me than spice and now I do a tad stricter carnivore (kind of. every animal products are fine but adding vegetables? if it’s in the stew, okay but putting tomato on my eggs when they are perfectly edible without? nope). I barely ever used sauces, actually, I am a simple one, I fry things, I ate them with raw vegetables and mustard, that’s it. If I need something because my fried meat is a bit dry and I miss some flavor too, I use some soy sauce, I don’t give that up but it’s rarely needed.
Sunflower oil in Tuna can
I love mustard but cannot for the life of me find any decent mustard in the shops that don’t have hidden carbs and sugar. I bought two types but then rechecked the ingredients when I got home and they had sugar in them. I love crunching mustard seeds 
. Kraft mustard in a bottle was filled with crap. Have to keep taking things that I thought were keto but are actually non keto to the food bank . Hey, at least someone benefits. I love love LOVE vinigar. Maybe a little too much. As a teen my go to snack was brown vinigar in a cup with mashed up cheese thrown in with it and salt. 
. Pretty gross now that I think about it 
. I love anything really sour yet I hate anything that tastes bitter. Yeah sour cream with meat is pretty gross unless it’s ground beef, I find. I used to love it in pumpkin soup. Yeah mint sauce is an acquired taste you either love it or you don’t.
Shredded cheese + sour cream + hot sauce… perfect midnight snack. I know we aren’t big fans of midnight snacking around here, but it happens and I love this one.
I’ve also been known to savor a spoonful of dijon. Well. I wasn’t known to, as I have always done it in secret where no one can make fun of me but myself. But I guess I’m know to now!
I am very choosy about my mustard… And I do my best to avoid sugar. Yeah, it’s tiny and when I eat fruit or even vegetables, that is sugar too but still, I don’t want sugar in the 1-2 products with more than one ingredient I actually buy. I found a nice one with erythritol in a webshop so I use that now. And I make my own mustard, it’s okay in dishes where great flavors mask its imperfectness… But it’s not good, not creamy, doesn’t work on top of my things. Oh well, I am sure mustard is just some temporal solution, I barely left vegetables behind… I use less and less of it. But I probably always will use some in certain dishes.
Do you eat pickled eggs? I heard about them just lately, it’s not a thing in this country and it’s time to make another bunch!
Pickled eggs, I’ve heard their name before but never actually seen them I live in Australia so to get them here would probably have to go to some special market deli or something. I live in a small country city so I’m not sure if they would have them here. Interesting though. Will look them up. Do you like Dill cucumbers? I eat mainly meat now but they are great for a little snack or side dish. Have to watch the label on the jar of course but you can get them in natural water or brine.
I can’t snack, if I eat a bite, it becomes a full-blown meal, almost always, be it midnight or 3am… I better avoid it. But it doesn’t matter, a good snack is a good snack as part of my meal!
I can’t imagine what is it like, I never ate anything similar, ever, I guess but maybe I will try it soon. The ingredients sound quite good and don’t clash…
I snacked on sour cream with red pepper, mustard, pickles and green peas as a kid. It was my simplified russian/olivier salad, that’s very popular in this country and people makes it with mayonnaise but my Mom made it with sour cream mixed with mustard (and it might not contain red pepper at all but it never stopped me. it was in the deviled eggs on top of the original salad made by my Mom anyway). I like to skip the not highly important ingredients from dishes and I did it very extensively in this case but I enjoyed the result and it was similar enough to the original according to my taste.
I dislike mayonnaise, it’s horribly fatty to me but maybe because I never did it with bacon grease - smoked ham in my case as I have that…
But I remembered another sauce, I almost never use it (I did it only a few years ago, maybe?) but it’s nice. Egg yolk, tomato puree, herbs, salt, vinegar. I put that on my boiled eggs. It’s to my liking as I love the ingredients. If I add much more tomato puree, water and use a hand blender, that’s my quick tomato soup, it’s a variant of egg milk.
Oh yeah, I almost forget people always buy things ready.
I obviously made my own, it’s simple. Vinegar, water, some… stuff…? Mustard seeds, maybe and I don’t know what else but I need mostly the vinegar, I have a nice tarragon flavored one. There are lots of recipes. It’s interesting and becomes brown if I use a dark balsamic vinegar but that’s very sweet, I usually mix it with some other vinegar.
Dill cucumbers are okay but I prefer pickles. My SO hates dill cucumbers and likes pickled vegetables (not eggs, never eggs! he can’t eat them). Pickles has sugar or some bad sweetener or both, I only find some without once. But it’s little enough, I still buy pickles a few times a year.