Preheat oven to 400°F. Bring water to a boil in a small pot. Add 2 Tbsp of salt to the water.
Halve jalapenos lengthwise and use a spoon to scoop out the pith and seeds. If you want your stuffed jalapenos to be spicy, chop up the pith and add it to the filling mixture.
Blanch the halved jalapenos in salted boiling water for about 30 seconds. Take them out and place them on a rack or cutting board upside down to dry out the insides slightly.
Mix the cream cheese, mozzarella, garlic seasoning, and bacon together in a bowl.
Stuff the jalapenos with the cream cheese filling.
Top the stuffed jalapenos with sourdough breadcrumbs.
Line a baking sheet with parchment paper and place the breadcrumb-topped, stuffed jalapeños on top in a single layer.
Bake the peppers at 400°F for 20 minutes or until top is brown and cheese is melted.