This is just a copy/paste of the salsa I make most often at home. It's just something I came up with with my husband and I's tastes in mind, but I've made it for guests and they always rave about it.
SOAKING PHASE
like 3 dried cascabel chiles or guajillos if no cascabel
like 15 dried pequin chiles
like 10 dried chiles de arbol
(All of these should be easy to order online if needed. The pequin aren't necessarily needed but they're good.)
Keep the water in case you need to thin it down for your tastes after processing, and probably throw a bit in either way because it's really flavorful. Taste it before adding some if you can be tender about spice so you know what concentration is right for you. You can either cut them up in rough pieces with kitchen shears as you're adding the dried chiles to the soaking water, or you can do it when adding them to the blender or food processor. Discard the stems.
CHARRING PHASE
3/4 of a large white onion, either charred over a gas stove burner or stir-fried on high heat in a wok (or anything with higher walls, really) with some oil. It will smoke.
half a head of garlic, '' ^ ''. Remove before it blackens, you just want it roasted.
4-6 roma tomatoes, '' ^ ''. Poke holes into them or quarter them so they don't sputter out boiling water in your eyes.
2-3 fresh jalapenos or serranos, ideally with striations, '' ^ '' You can go with something spicier or more of them if that's your preference, as we often do.
2-3 tomatillos, quartered, but I've made it without before when I was retarded and forgot and it was still great so no worries if you don't live in a spic-heavy area.
(once you're done charring or stir-frying, wait for it to cool down and put in the blender)
BLENDER OR FOOD PROCESSOR PHASE
if you dry-fried, add a bit of neutral oil for texture, but if you wok-fried with oil, there is no need for that.
add about a bunch of cilantro, stems included if your blender or food processor won't fuck that up
2-3 fresh limes, pressed. start with less than you think you need just in case.
half a head to a head of raw garlic
the other fourth of the white onion
a tiny bit of cumin, start slow because nothing enrages me more than a salsa that just tastes like cumin lmfao. I know that's an intentional thing for some people but I'm not a spic and it bother me when it's too much.
s & p