Spinach-and-Vidalia Dip

Name: Spinach-and-Vidalia Dip
Cook time: 1 h 25 min
Total time: 1 h 25 min
Cuisine: American
Ingredients: 3 tablespoons (1 1/2 oz.) salted butter; 4 cups chopped Vidalia or other sweet onions (about 2 large); 1 (5-oz.) pkg. fresh baby spinach, coarsely chopped; 1 teaspoon kosher salt, divided; 1/2 teaspoon black pepper, divided; 1 (16-oz.) container sour cream; 2 tablespoons chopped fresh chives; Potato chips and medley of veggies like cucumbers, radishes, and bell peppers