Slow Cooker Corned Beef (Tender, Juicy, Easy) - Zest Plate - Zest Plate

Ingredients

• 3 to 3 1/2 pounds cured corned beef, with spice packet
• 1 medium white onion, quartered
• 2 cloves garlic, peeled and left whole
• 3 cups water
• 1 1/2 pounds new red potatoes, washed and chopped into 2-inch chunks
• 1 medium (about 1 1/4 pounds) green cabbage, cut into sixths
• 4 large carrots, peeled and cut into 2-inch slices
• Whole-grain mustard, for topping