2 tbsp (30 ml)  butter

454 g  sliced crimini mushrooms (about 4 cups)

Sea salt and freshly ground pepper, to taste

1 19 oz (540 ml) can white kidney beans, drained and rinsed

2 tbsp (30 ml) mayonnaise

2 tbsp (30 ml) fresh lemon juice

Zest of 1 lemon

¼ tsp (1 ml) garlic powder

2 tbsp (30 ml) chives, minced, plus more for garnish
1 tbsp (15 ml) olive oil

8 - 1” slices sourdough bread

½ cup (125 ml) shredded mozzarella cheese

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