Marija's "Meatloaf"

Ingredients

• 1/2 cup ketchup
• 2 tablespoons sugar
• 1 tablespoon Apple cider vinegar.
• 1 tablespoon hot chili sauce, (such as Sriracha)
• 1/2 teaspoon regular salt or 1/4 teaspoon Morton kosher salt
• 2 tablespoons vegetable oil
• 8 ounces crimini mushrooms, or regular button mushrooms, trimmed, sliced 1/2" thick
• Two medium onions, sliced 1/2" thick
• 2 tablespoons ketchup
• 2 tablespoons soy sauce
• 2 tablespoons vegetable bouillon base (better than bouillon is good brand)
• 1 Tbsp garlic powder
• 2 teaspoons dry oregano
• 2 teaspoons ground pepper
• 2 teaspoons yellow mustard
• 1 teaspoon regular salt, or one half teaspoon kosher salt
• 2 8.8 ounce packages pre-cooked brown rice, or 1 3/4 cups cooled cooked brown rice
• 1 15 ounce can of pinto beans, rinsed
• 3/4 cup quick-cooking oats oats