If by developing you mean already exists, then yes. We already know what foods are high carbon, and it is mostly animal agricture, specifically ruminants due to their high energy input to calorie ratio, and methane emissions.

We also know there are tons of ways to eat plant based. Have you had Ethiopian, Chinese or Indian dish without meat? Ever subbed meat for beans in a burrito? A great homemade black bean burger, or a snack of hummus? It's easier than ever to eat plant based and cook a whole planet's worth of cusine without resorting to processed fake meats

Good point. Maybe it's more of an educational thing. I'm currently trying to reduce the amount of meat that I eat and until someone told me, I honestly didn't realize that rice + beans = a complete protein.

I know this sounds dumb, but a lot of the difficulty I'm having now is figuring out how to structure plant based meals when I'm used to the structure "a piece of meat with some vegetables on the side or as toppings". Its not so much that I miss meat as much as it is that I feel like my meal is missing something and I'm not sure what non-animal thing should fill that role.