1Add chicken breast, chicken thighs, tomato paste, chicken bouillon, marinara, red chili flakes, italian seasoning, red lentils, and bone broth to a slow cooker.
2Cook on high for 4–5 hours or low for 6–7 hours.
3Shred the chicken directly in the slow cooker using a spatula or by pressing against the sides.
4Add the cottage cheese, mozzarella, parmesan, chives, salt, and garlic powder directly into the sauce and stir to combine.
5Layer lasagna in a pan with 4 lasagna layers and 5 sauce layers, starting and ending with sauce, placing lasagna sheets between sauce layers.
6Top with remaining mozzarella and parmesan, cover tightly with foil, and bake at 375°F for about 40 minutes, placing the pan on a sheet pan for stability.
7Remove foil and broil for 5–10 minutes until browned and bubbly.