Blueberry French Toast Cobbler

• 4 1/2 blueberries (fresh)
• 4 eggs
• 1 french bread loaf
• 1 baking shee in bowl
• 120 ml milk
• 100 gr sugar
• 28 gr butter melted
• 4 gr vanilla extract
• 3 gr cinnamon
• 3 gr cornstarch