Pot Roast Gyros

Bahan-bahan (6 porsi)

• 1 yellow onion, sliced
• 2 shallots, sliced
• 8 cloves garlic, chopped
• 1 tablespoon sweet/smoked paprika
• 1 tablespoon ground cumin
• 1 tablespoon dried oregano
• 2 tablespoons fresh thyme
• 1/2 teaspoon cayenne
• 1 teaspoon pink Himalayan salt
• 4 pound chuck roast
• 1 (12 ounce) beer (or use chicken broth)
• 1/4 cup lemon juice
• 3 tablespoons salted butter
• 6 fresh pitas or naan, warmed
• pickled red onion, lettuce, and herbs for serving
• Tzatziki, for serving