How to Make It
In a 4- to 6-quart slow cooker, combine the pork, squash, tomatoes (and their juices), jalapeño, garlic, chili powder, 4 cups water, and 1¼ teaspoons salt. Cover and cook until the pork is very tender, on low for 7 to 8 hours or on high for 5 to 6 hours (this will shorten total recipe time).
Fifteen minutes before serving, heat oven to 450° F. On a rimmed baking sheet, toss the tortillas with the oil and ⅛ teaspoon salt. Bake, tossing once, until crispy, 8 to 10 minutes.
Transfer the pork to a medium bowl and, using 2 forks, shred the meat; return it to the slow cooker. Serve the soup with the tortilla strips, radishes, cilantro, and lime wedges.