3 mussels steamed with bacon and Recipes

fennel bulb with stalks, applewood-smoked bacon , cut crosswise into thin strips, red potatoes , cut into 1/2-inch pieces (about 2 cups), kosher salt, freshly ground black pepper, beer, mussels , scrubbed and debearded (about 40), green beans, trimmed and cut into 1/3-inch pieces (about 3/4 cup), fresh lemon juice

mushroom caps, butter, lemon juice, mussels, steamed and removed from shell, bacon, partially cooked and cut into 4 pieces each (to make 12 pieces bacon total)