In a dutch oven or very large pot, heat olive oil over medium heat. Add onions and cook until translucent. Add garlic and sauted for a few minutes.
In a separate skillet, brown hamburger and sausage. Drain excess liquid/fat. Place meat into pot with onions and garlic.
Add tomato paste to pot. Mix to distribute.
Add tomato sauce and crushed tomatoes. Mix well. Turn heat to medium, add pepper, sugar, Italian seasoning, and fennel seeds. Stir frequently. Once sauce starts to simmer, reduce heat to low. Add fresh basil and parsley.
Continue to simmer for 1 to 2 hours, continue stirring frequently.