In a medium sized skillet, brown the sausage and set aside. In a large skillet heat the olive oil over medium high heat and add the minced garlic. Saute for 2 minutes. While the garlic is cooking, add the basil, sea salt, and pepper to the scrambled eggs and mix well. Pour the egg mixture over the garlic in the skillet and turn the heat down to medium. Cover and let cook for about 3 minutes, or until the bottom of the eggs are set and firm. Do not stir or disturb the eggs while cooking. Remove the lid and transfer the skillet to the oven and broil for another 3 minutes or until the top of the frittata is also firm. Remove from the oven and add evenly spread the 1/2 cup of marinara sauce. Add the cooked sausage and the rest of the toppings. Place the pizza back in the oven and under the broiler for another 5 minutes. Slice and serve immediately with avocado slices as a garnish!