I tried this recipe yesterday--it's so easy and tastes great!
Basically you can use any veggies you want but being that it's Paleo, there are no legumes (beans, etc).
2pkgs lean ground turkey breast (brown on stove first)
4 whole tomatoes
2 peppers (i used red and orange)
Brown ground beef, add to slow cooker. Toss in remaining ingredients and cook on low for 4-6 hours.