Photo of White bean, tomato, and spinach gratin by WW

White bean, tomato, and spinach gratin

Total Time
1 hr 3 min
18 min
45 min
A layer of crunchy breadcrumbs tops this gorgeous-looking vegetarian casserole. Rosemary and dry white wine add fabulous flavor. It also features onions, garlic, cannellini beans, diced tomatoes, fresh spinach, and lemon juice. The topping is easy to make and quickly comes together, as all you have to do is mix the panko, Parmesan cheese, and melted butter together before sprinkling over the veggies. All that's left is to bake in the oven until the topping is browned, which should take just 20 minutes. You can make it vegan by swapping in your favorite vegan cheese and butter substitutes. You could also make this dish in individual ramekins for a pretty presentation and easy portion control.


Cooking spray

2 spray(s)

Olive oil

2 tsp, extra virgin


2 large, thinly sliced

Kosher salt

2 tsp, divided

Jarred minced garlic

2 tsp

White wine

¼ cup(s), dry

Canned cannellini beans

38 oz, rinsed and drained

Canned diced tomatoes

30 oz, drained


5 oz, baby leaves


2 tsp, fresh, minced

Fresh lemon juice

1½ tsp

Unsalted butter

2 Tbsp

Panko breadcrumbs

1 cup(s)

Grated Parmesan cheese

¼ cup(s)


  1. Preheat oven to 375°F. Coat a 10- X 6-inch glass casserole dish with cooking spray.
  2. Heat oil in a large nonstick skillet over medium heat. Add onions and 1 teaspoon salt; cook, stirring frequently, until softened and onions begin to brown, about 15 minutes. Stir in garlic; cook for 1 minute. Stir in wine; cook until evaporated. Add beans, tomatoes, spinach, rosemary, and lemon juice; cook, stirring occasionally, until heated through and spinach has wilted, about 1 to 2 minutes. Spoon mixture into prepared dish; set aside.
  3. Microwave butter in a large microwave-safe bowl until melted. Add bread crumbs, cheese and remaining 1 teaspoon salt; stir until completely combined. Spoon crumb mixture over bean mixture; bake, uncovered, until browned and bubbly, about 20 to 25 minutes. Yields 1/6th of casserole per serving.