• 1 lb baby bella mushrooms, cleaned and stems trimmed if desired
• 1 red bell pepper, cut into 1-inch cubes
• 1 yellow bell pepper, cut into 1-inch cubes
• 1 orange bell pepper, cut into 1-inch cubes
• 2 red onions, cut into 1-inch chunks
• 1 (20 oz) can pineapple chunks, drained
• 2 tablespoons neutral oil (such as avocado, canola, or grapeseed)
• Salt, to taste
• Black pepper, to taste
• ½ cup BBQ sauce, plus more if desired for serving