Fresh Homemade Salsa for Canning

After one of our trips to Market on the  Move, we had a lot of tomatoes and peppers, so I decided to make a batch of salsa. I found the recipe on www.food.com,
Ingredients:
30 -40 tomatoes

2 lbs onions (1/2 yellow, 1/2 red, I usually add 1-2 additional onions)

5 assorted red bell peppers, green bell peppers or 5 yellow bell peppers

3 -4 chili peppers

2 -3 jalapeno peppers or 2 -3 other hot peppers like Serrano peppers, habanera peppers etc (I used Serranos, only because Habaneras were almost $8 per pound)
1 cup lemon juice                                           

2 teaspoons garlic powder

3 tablespoons salt

4 teaspoons pepper

5 tablespoons chopped cilantro, to taste

 Directions:

1. Wash all jars, lids etc in the dishwasher.
2. Always wear gloves while preparing salsa! (especially if you wear contact lenses)
3. Prepare tomatoes by soaking tomatoes in boiling water for 2-3 minutes to split and loosen skins. Peel and chop all tomatoes, drain excess juices off in a strainer or colander before adding to extra large bowl. (I half or quarter the tomatoes, then process briefly in a food processor before draining off juices, I like the tomatoes kind of chunky).
4. Dice or cube all onions and peppers into the same bowl. Add chopped cilantro. (I do all the onions, peppers and cilantro in a food processor - I keep them kind of chunky also).
5. Once all the veggies are in the bowl, stir in the lemon juice, garlic powder, salt and pepper.

1. 6. Taste to see if it is as hot as you would like it - if not add 1-2 more hot peppers tasting after each addition. Keep in mind as it sits for a while it will get a little bit hotter.
2. 7.  Fill jars leaving about 3/4 inch at the top. Wipe off tops of the jars before putting lids on. Screw lids tight then turn back about 1/4 turn.
3. 8.   Process in steam canner (not pressure cooker / steamer) or boiling water bath for 15 minutes.
4. 9.   Cool jars.
5. 10.  Before storing, test each jar to be sure it has sealed by pressing down on lid, it should not move.