In a large skillet, heat grape seed oil on medium high heat. Once oil is hot, turn heat to medium, add chopped red onions and saute for 5-7 minutes. Add chopped garlic cloves, mix well and saute for 2-3 minutes. Add chopped tomatoes, bouillon cube, black pepper and red pepper flakes. Mix well and cook on medium heat for 3-4 minutes, add baby spinach leaves, mix well, then turn heat to medium low, cover skillet and cook for an additional 5-7 minutes until tomatoes are soft, spinach has withered and oil is released. Turn heat back to medium high, add vegetable stock, mix well, cook for 1-2 minutes, now add marinara sauce and bring to a boil. Once sauce reaches boil, turn heat to medium low, cover and simmer for 20-25 minutes. Uncover, add honey, mix well, cook for final 1-2 minutes. Turn off heat. Set aside and let cool.