Okay

I'll start out with something relatively simple, with one of the first things I learned. Should take you about 10 minutes of preperation and a cooking time of about 3 hours - but it's worth it.
A note before I start, you can either cook this or leave it uncooked depending on what you are applying it to. Use fresh tomatoes, you would need about 12-15 medium sized tomatoes. There is definitely more work involved when using fresh tomatoes, but it is worth the effort First, you will need to get the skins off. The easiest method for this is to score the skins with a sharp knife, and then boil them for about a minute and then place in cold water. You will want to do this in batches. Once you the tomatoes have cooled, the skins should peel off relatively easily. Then chop them up, and place them in a blender. You can control how chunky or smooth you want the sauce by how long you blend them for.
1.) At least 4 garlic cloves
2.) 3-5 tablespoons of basil (I eye ball it, naturally if it's your first time - don't recommend that.
3.) 1-2 tablespoons or so of black pepper or more depending on your taste
4.) 1 tablespoon of sugar
5.) 2 tablespoons of olive oil (I usually add various wines - once again, depending on what you fancy
6.) 1/3 or 2/3 of Parmesan (depending on how rich you want it) I'll post something for homemade Parmesan later but were just starting here
6b.) Romano cheese is also an option
7.) Minced peppers (depending on how hot you want it)
If you choose to heat it..
8.) Heat the olive oil in a 5+ qt. pot over medium heat, than add some garlic
9.) Heat for one to two minutes, making sure not to burn the garlic, then add all the tomatoes, black pepper, basil and sugar. Stirring often, bring to a low boil
10.) Reduce heat to low and simmer for 2-3 hours stirring often.
11.) Add the cheese and stir often
12.) This will make about 4-5 jars (I assume most of you reading this know how to can, pretty straightforward)
Back home, we add this to everything from chicken, steak, pork, cacciatatore (basically cured sausage)
Give it a try, it can be time consuming but like I said you can store it and its far cheaper and much, MUCH better