Heat olive oil over medium heat. Add veggies to the oil and add bay leaf. Melt veggies for 20-30 minutes. Add chopped pancetta. Cook for another 20-30 minutes. Add ground pork and beef. Cook another 20-30 minutes. Add glass of red wine. Cook down. Add chicken stock. Cook down again for another 40 minutes. Melt tomato paste into a splash of chicken stock to thin it out. Add and stir really well into meat. Cook down again. Add chicken base a little at a time until desired seasoning is reached. Add milk, stir. Finish with butter. Pour sauce over al dente pasta and finish with freshly grated parm.