morning star farms veggie burgers?

^^Everything is good with caramelized onions. Why are you trying to go meatless?

Not sure if they're available outside Canada, but I find that Yves products are generally higher in iron and protein than most of the other veggie meat analogs on the shelves and just as tasty or tastier.

I wouldn't substitute fruits and veg for meat, and I think people should eat lots of vegetables (and some fruit too, if they like it) with diets that include meat too. I certainly wouldn't see meat and fruits and veg as trade-offs. Instead, I'd replace meat with vegetarian (or plant-based) forms of protein, like tofu and tempeh (or the burgers you mention), beans and lentils, more of other foods that have smaller amounts of protein but can be helpful for protein in a plant based diet (like nuts and seeds, grains). You do get protein from vegetables too, but not as much and like I said I'd consider those a non-negotiable whether I was consuming meat or not, especially since they are pretty low cal. (Seitan is another non animal source of protein, although I personally have not experimented with it much, in part because I enjoy soybean sources like tofu and tempeh and know how I like to use them, so tend to gravitate to them.)

This is NOT to discourage you, as I also am greatly reducing my consumption of meat and eating plant-based more often than not, but the shift isn't vegetables, but the source of protein (so I'm eating more starches and especially beans and lentils).