With the Instapot on sauté, heat the oil until shimmering. Add the peppers and onions and season with salt and pepper. Cook, stirring, until the onions are soft and translucent, 3 to 5 minutes. Add the garlic and cook until fragrant, about 45 seconds. Add the cornmeal, turkey, and beans. Stir to combine. (The mixture will be quite thick.) Add the spices, tomatoes, and water. Do not go beyond the fill level indicated on the inside of the metal insert.