Corned Beef With Onions And Greens

• 8 instead of cabbage
• 6 garlic (cloves)
• 5,200 gr dutch oven
• 1,400 gr corned beef
• 700 gr potatoes
• 400 ml beef broth
• 350 ml dark beer
• 30 ml olive oil
• 2 gr pepper
• 4 slices onions