In a large deep skillet, cook bacon over medium heat until crisp. Remove bacon, and let drain on paper towels, reserving drippings in skillet.
Heat drippings over medium-high heat. Add onion; cook until lightly browned, about 2 minutes. Add squash, zucchini, salt, and pepper; cook, turning occasionally with a spatula, until tender and lightly browned, 8 to 10 minutes. Spoon into a serving bowl. Crumble bacon. Sprinkle bacon and basil over squash. Serve immediately.
Recipe by Southern Lady Magazine at https://southernladymagazine.com/skillet-summer-squash-with-bacon-and-basil-recipe/