I avoided mixed even before going gluten-free. Most are simple to create on your own. For tacos, we do the following:
Brown a lb of ground beef (or more in a family the size of ours), adding onion and garlic when almost brown so that the flavors can mix as the onion becomes translucent. Drain grease. Add salt, pepper, 1TBL chili powder, 2TBL cumin, and...