Roll Ups With Bacon Peas and New Potatoes

Name: Roll-Ups With Bacon, Peas, and New Potatoes
Ingredients: 1 pound new potatoes, scrubbed and cut into 1/2-inch pieces; 8 white corn tortillas; 1 tablespoon butter; 4 to 6 slices precooked bacon, crumbled; 1 cup frozen peas, defrosted in 2 cups water and drained; 1 teaspoon fresh thyme leaves or 1/3 teaspoon dried; 2 scallions, thinly sliced; 1 cup sour cream; 1/2 teaspoon kosher salt; 1/4 teaspoon freshly ground black pepper