Lobster Salad with New Potatoes and Pickled Onion Recipe

Ingredients

• 1 12-ounces bottle pale lager
• 2 1 1/2-pound live lobsters
• 1 pound new potatoes or small Yukon Gold and/or red-skinned potatoes, scrubbed
• 1 tablespoon kosher salt, plus more
• 1/4 cup red wine vinegar
• 1 tablespoon sugar
• 1/2 medium red onion, thinly sliced
• 2 tablespoons fresh lemon juice
• 1/4 cup olive oil, plus more for drizzling
• 1/2 cup fresh mint leaves
• 2 cups frisée (optional)
• Freshly ground black pepper