I never get this “too good to be true” things. My healthy, affordable and lowest-carb items are SUPER tasty. My main item is the one I find the most delicious in existence. Why wouldn’t it be…? I am lucky but still. Keto food is often quite delicious. And vegs are carby but some aren’t very much. Usually the less carby ones have less taste but that can work out… I never cut out vegs just because they grew below earth or had much carbs per 100g, I didn’t care about that! I cared about the joy they brought and if they cut fit into my keto 
Squash is low-carb enough that it may work if you eat it in moderate amounts. But those may be plenty for some people. I noticed not everyone consider 1000g vegs minimal - as I did in the past…
I played with planning days a lot, trying to figure out which vegs in how big quantities may give me the most flavor and joy… I liked to combine my vegs so I got a little volume and nice flavors.
Nutritious wise, apart from carbs, I don’t know, I ate vegs for joy, mostly. (It probably isn’t good if a vegetarian doesn’t eat vegs anyway…
)
I got my nutrients from my animal products and oily seeds, mostly.