Toast de-seeded and de-stemmed guajillo and chile de arbol peppers on a dry pan for 30-45 seconds or microwave for 15-20 seconds
Roast garlic and shallot to add depth to the flavor
Add roasted garlic, shallot, fire roasted tomatoes, toasted dried chili peppers, soy sauce, spices, and honey to a blender
Blend for about 2 minutes until completely smooth
Add cubed flank steak to slow cooker
Pour blended sauce over the steak and mix well
Cook on high for 4-5 hours or low for 5-6 hours until meat is extremely tender
Add goat cheese, parmigiano reggiano, milk, nonfat Skyr or Greek yogurt, red chili flakes, and chives to the slow cooker
Add half-cooked rigatoni (cooked to 50% of time shown on box) to the slow cooker
Cover and cook for 20-25 more minutes to finish cooking the pasta
Divide into 10 equal sized containers and store in the freezer for several months
Microwave for approximately 4 minutes to reheat, adding 2-3 tablespoons of milk for a creamier sauce
