When you make Spag bolognese do you put the pasta in with it or boil that on the stove? i really want to make SC bolognese but i dont want to have the need to use the stove as well.

My normal bolognese (cooked on the stove) is

As much mince as i have, 1 generous squirt of tomato paste (approximately 200g) 1 tin tomatoes, whole, crushed or diced, sprinkling of onion flakes, sprinkling of garlic, sprinkling of mixed herbs, oregano, basil, and that is about it. so to make it in the SC with the pasta in it how much liquid will I need to add?