Step 1

Preheat the oven to 375°F. Prepare a half sheet pan with a piece of parchment paper.

Step 2

Add the sliced red onions, olive oil, and vinegar to a bowl. Toss well to coat the onions. Let the onions sit at room temperature for 30 minutes to marinate, tossing halfway through.

Step 3

Lay the bacon onto the sheet pan. Roast for 20-25 minutes, or until crisp. Transfer the bacon to a plate lined with paper towels to drain. Remove the parchment and replace with a new piece. Raise the oven temperature to high broil.

Step 4

Meanwhile, combine the mayonnaise, hot sauce, smoked paprika, cayenne, and salt in a small bowl. Whisk to combine.

Step 5

Place all 8 slices of bread onto the sheet pan. Spread half of the spicy mayo onto the “bottom” 4 slices of bread and top with the slices of cheese. Place the pan into the oven on the middle rack and broil for 2-3 minutes, or until the bread is toasted and the cheese is melted. Spread the remaining spicy mayo onto the remaining “top” 4 slices of bread.

Step 6

Distribute the turkey, bacon, alfalfa sprouts, avocado (sprinkle with flaky sea salt), marinated red onions, and dill onto the bottom slices of bread. Close the sandwiches and cut each in half before serving.