Sloppy Joes

Ingredients

• 1¼ pounds 90% lean ground beef
• ½ teaspoon baking soda
• 2 tablespoons unsalted butter, plus more for buns
• 1 medium yellow onion, finely diced
• 1 small red bell pepper, finely diced
• 3 cloves garlic, roughly chopped
• ¾ teaspoon salt
• ½ teaspoon freshly ground black pepper
• 1½ teaspoons smoked paprika
• ¾ teaspoon ground cumin
• ½ teaspoon dried oregano
• ¾ teaspoon dry mustard
• 1 (14-oz) can tomato sauce
• 2 tablespoons tomato paste
• 1 tablespoon Worcestershire Sauce
• ½ teaspoon hot pepper sauce, such as Tabasco or Frank's, or to taste
• Hamburger buns