whole boneless beef chuck roast, cut into 3 steaks,
white button mushrooms, quartered,
medium carrots (10 ounces; 275g), 2 left whole, 2 cut into bite-size pieces,
Baby Yukon Gold potatoes, halved,
small celery (3 ounces; 85g), sliced,
medium cloves garlic, peeled diced,
large yellow onion (10 ounces; 275g), peeled, split in half,
frozen or fresh pearl onions (thawed if frozen, peeled if fresh),
frozen peas,
chicken stock,
tomato paste (2.5 ounces; 75g),
powdered unflavored gelatin (1 ounce; 30g)