In a large pan cook the onions with a few tablespoons of olive oil and salt and pepper to taste until translucent. Add the minced garlic and cook on low heat until lightly browned. Make sure to stir throughout. Add the tomatoes to the pan and continue to stir occasionally and cook until tender.
Season the chicken with salt and pepper. I use Spike seasoning as well. Cook the chicken on medium-high in several batches so the pan is not over crowded. Chicken should be lightly browned.
Add chicken to the tomato sauce and place in oven at 350F for 20 minutes.
Serve with orzo, top with parsley, pine nuts and Parmesan.