I hate those wild plants. They might cause some allergies or has some poison/toxic properties. I would prefer to eat wild animals. With those large grasslands If I were them I will raise some horses, cow, sheep, goat, chickens or even rabbits for food.
What if the pasture is not too large? Suppose that you are having 10 hectares of land. That much land can support only 5-6 horses at the most. And even if you slaughter one horse every year, the meat won't be enough for more than 2 weeks (if your family is consisted of 4-5 members).
Yeah, you would need a large pasture for that. If I have just 10 hectares, I'd probably just farm grains and eat those directly rather than use those for animal feed. If I really need to sneak in some meat in my diet I'd probably go for rabbit. I heard they can be fed hay so maybe I can use the straw left after harvesting the grains.