Oatmeal Cake With Lazy Daisy Frosting

• 2 eggs
• 375 gr brown sugar
• 350 ml boiling water
• 200 gr sugar
• 190 gr all purpose flour
• 160 gr quick-cooking oats (uncooked)
• 140 gr nuts coasely (chop)
• 85 gr butter
• 60 ml evaporated milk
• 55 gr butter