I dont really dabble in the cooked salsa...but anytime you want a pico Dr gallo recipe,I did work in a Mexican restaurant for almost 20 years...
For the green salsa,I know two differend kinds...one,the spicier..
Find a tin of stewed jalapeño peppers,the one with carrots in it.ive seen small babyfood sized tims and jumbo,like canned ketchup sized.Simply blend this up with a touch of salt and garlic.
The milder,but still zippy...
Take one small tin of above.If you can find tinned tomatilla green tomatos of the same size,great..use one of those...if the larger are only available,measure it out...the more you add,the less spicy.Blend these all together,put in a pot on low,add juice of halve a lime,two cloves of garlic,minced(or a teaspoon of already crushed in oil if you like,have it)quarter teaspoon of salt if .add a tablespoon of fresh chopped cilantro leaves ,bring to a slow boil and remove from heat.Dont overcook,or even better,add the cilantro around half way through...as if it cooks too much it gets very bitter.
For a nice,spicier version,use a small tin of chipolte peppers in adobo sauce rather than the jalapeño,blend everything till smooth,leave out the cilantro(fresh) and simmer for half an hour on medium low.
Small note..the tomitillo I use usually have some cilantro as an ingredient.
LMK if you try either,enjoy.
The chipolte sauce above I usually have as a sauce on top of enchiladas,chimichangas,burrito s ect.
Adding a half can of creamed corn to it when blending really adds a nice,sweet rich taste.
Jimmers