Chipotle Mayo Steak (Print Version)

# Ingredients:

→ Caramelized Onions

01 - 3 large red onions, thinly sliced
02 - 3 tablespoons olive oil
03 - 1 teaspoon Diamond Crystal Kosher salt
04 - 1/2 cup water, add more as needed

→ Chipotle Mayo

05 - 1 cup mayonnaise
06 - 1/4 cup sour cream
07 - 3 canned chipotle peppers in adobo sauce
08 - 3 tablespoons adobo sauce from the can

→ Sandwich Components

09 - 1 1/2 pounds skirt steak
10 - 1 large baguette or 4 ciabatta rolls
11 - 1/2 pound provolone cheese, deli sliced
12 - 1 to 2 cups baby arugula (optional)
13 - 2 1/2 teaspoons Diamond Crystal Kosher salt
14 - 1/2 teaspoon black pepper
15 - 2 tablespoons neutral oil
16 - 1 tablespoon olive oil, plus extra if needed

# Instructions:

01 - Heat a large pan and toss in the onions, a splash of water, olive oil, and some salt. Cover and cook over medium-high for 12-15 minutes until tender. Take off the lid, lower the heat to medium, and cook another 30 minutes, stirring often. Add a little water here and there to stop them from sticking or burning.
02 - Stir together the mayo, sour cream, chopped chipotle peppers, and a few spoonfuls of adobo sauce. Taste and add salt or pepper if needed.
03 - Warm up a pan over medium-high heat. Cut the steak to fit, pat it dry, and coat generously with salt and pepper. Pour in some oil and sear the steak for about 3 minutes each side till it's nicely browned. Let it rest covered in foil for 5 minutes, then slice it thinly against the grain.
04 - Set your oven to 450°F. Cut the baguette open and lay it on a sheet lined with foil. On the bottom half, spread the chipotle mayo, then pile on the steak, onions, and cheese. Brush the top half with olive oil. Bake for 3-5 minutes, just long enough to melt the cheese. Add arugula if you'd like, close the sandwich, and cut it into sections.

# Notes:

01 - For a faster method, sauté the onions for 5-10 minutes instead of caramelizing fully.
02 - Make the onions in advance to save time.
03 - Leftovers stay good for up to three days. Reheat them wrapped in foil at 350°F.