I made a first stab at "Primal Tacos" over the weekend. This is all at the improv stage but essentially I sweated down chopped red onions and a clove of crushed garlic in coconut oil, started browning the ground beef and then added ground cumin, ground coriander, cinnamon, and mild chili powder (ordinarily I'd use hot chili powder or tabasco but had made a pretty hot salsa to go with so didn't want to overpower the spouse!). Then about a rounded tablespoon of tomato paste. All this is "too taste", I'd say I was probably throwing in between 1-1/2 to 2 teaspoons of each of the above. Salt and pepper to taste as well.
The combination of the coconut oil and a not extra lean ground beef plus, I think, the tomato paste made for a nice, moist consistency (but not too messy!). Served this with home made guacamole, the salsa as above, sourcream, rolled up in a super lettuce leaf they have here in the UK called "Little Gem" -- not sure if it's available in the US but if not romaine or even standard iceburg would be fine. Husband scoffed it down and I was pleased with the results, although I think it needs some tweaking. We're not huge cheese eaters so I skipped that but of course sprinkled grated cheese would be good too if you like it!