Heat a teaspoon of oil in a large saucepan over medium heat. Add the fonio and toast for 1-2 minutes, stirring frequently. Add the water and salt, and bring to a boil. Reduce to a simmer and cook until no liquid remains, about 7-8 minutes.
Transfer the cooked fonio to the bowl of a food processor. Add the oats, harissa paste, onion, garlic, spices, and tomato paste. Process for 20-30 seconds, scraping down the sides regularly until everything is well combined and the mixture is sticky enough to form balls. Taste and adjust seasonings if needed.
Using your hands, form balls (about 3 tablespoons of the mixture per ball). Transfer to a large plate or dish lined with parchment paper and set aside. You should get about 12 balls.
Heat a tablespoon of oil in a large non-stick skillet over medium heat. Once hot, add the balls and rotate the skillet to coat the balls with oil. Cook for about 5 minutes, stirring regularly until the balls are golden brown on each side. Remove from heat and cover to keep warm.
Coconut Peanut Sauce
Heat the oil in a large skillet over medium heat. Once hot, add onion, garlic, and grated ginger. Cook for 1 minute. Add the carrot and red bell pepper, and cook for 5-8 minutes or until the carrots are soft.
Pour in the coconut milk, peanut butter, water, tomato paste, coconut sugar, ground chili, and salt. Stir well to combine everything. For a thinner sauce, use 3/4 cup water instead of 1/2 cup. Taste and adjust salt or sugar if needed. Cook for another 3-5 minutes.
Transfer the fonio balls to the sauce and stir to coat. Cook for 2 minutes. Top with peanuts, red pepper flakes, and fresh parsley. Serve immediately on top of rice or simply with a green salad.