Heat oil, garlic, and pepper flakes in a medium (10-inch) skillet over medium heat. When garlic sizzles and starts to turn golden, add beans and 1/4 cup bean liquid. Increase heat to medium-high and cook to heat through and blend flavors, 3 to 4 minutes. Adjust seasonings, including salt and pepper to taste. When bean liquid has thickened and turned creamy, stir in herbs.