Ground beef→Lentils, walnuts, or soy crumbles
Why
Beef has 20–60× the climate footprint per gram of protein.
How
Brown soy crumbles like beef. For tacos, simmer cooked brown lentils with cumin, smoked paprika, garlic, tomato. For bolognese, swap half the meat with walnut + mushroom mince — texture is closer than you'd guess.
Nutrition
Lentils: 18 g protein per cooked cup, plus 16 g fiber and iron.