Trim chicken of extra fat, sprinkle generously with salt and pepper and dredge in your choice of flour, set aside.
Slice onions, carrots (carrots should be thin or they won't cook through, about 1/8") chop garlic, zest lemons, then squeeze lemon juice, set aside
Put butter, ghee, coconut oil or olive oil in Multicooker and set to brown/sauté at 400 degrees (or place in a cast iron pan on medium high heat)
Once the pan and fat are hot, add half the chicken skin side down and brown six minutes per side. Remove and repeat with second batch of chicken. Set all chicken on a plate.
Add garlic and onions to crock pot (or pan) and sauté until softened and slightly browned (about 8 minutes)
Add rosemary, a pinch of sea salt and a few turns of pepper.
Add lemon juice, scraping brown bits from pan with wooden spoon or silicone spatula. Let juice come to a boil and reduce by half (about 2 minutes)
Add broth and lemon zest, stir. (If using a traditional crock pot add all to veggies to crock pot now)
Add sliced carrots, and nestle browned chicken on top, then lemon slices. Place lid on multicooker and set to slow cook on low for 6 hours.
Serving suggestions: I love it as is but you can serve it with salad, steamed broccoli or over rice, barley, quinoa or couscous.