Add the onion and bell peppers. Cook until the onions are translucent. Add the ground turkey and chicken and cook until it starts to brown. Once the meat has browned, add the red pepper flakes, fennel, fenugreek, sugar, oregano, and basil. Add the red wine and let it reduce by half. Finally, add the tomato mixture. Reduce the heat to low, cover, and simmer for at least 30 minutes. Set aside until you assemble the lasagna.