Nothing you'll manage will taste remotely of chili in the traditional sense I'm afraid, but I think you could get away with something like... Ground beef with coconut milk? If you simmered it long enough and cooked off most of the water it might recreate some of the chili stuff you're looking for. Maybe some lemon to cut the fat and some other spices/herbs like garlic, cumin, black pepper, cinnamon... Or you could try toying with different spice blends like an Italian (oregano, garlic, basil, thyme, rosemary) or herbes de provence (majoram, thyme, rosemary, savory, basil, sage, fennel seeds), or maybe a curry (cumin, tumeric, mustard, coriander, cardamom, black pepper) or a garam masala (cumin, coriander, cardamom, black pepper, cinnamon, cloves, nutmeg).
I'm nightshade free too, learn to love spice blends and to cut all your savoury dishes with an acid and you're golden ^_^