Just something I threw together real fast last night:
In a pan over medium heat:
Some Olive Oil - not sure how much, maybe 1 1/2 tbsp.
Salt and Pepper
2 or 3 cloves Crushed Garlic
1/2 medium White Onion, chopped into small peices
Couple sprigs each of Marjoram and Oregano
Heat and stir until the onions are translucent, then add in 1 can (I think it was 12 oz.) of Diced Tomatoes (drain first!). When it starts to bubble lower the heat to a simmer and let it cook until your pasta is ready - I used bow tie.
Topped with grated Pecorino Cheese - but you could use Parmesan or Romano. A little lighter than normal spaghetti sauce.