Pea and smoked Cheddar muffins

For 6 muffins

• 250 g green peas (fresh, frozen)
• 200 g smoked Cheddar (diced)
• 120 g flour
• ½ tsp baking powder
• 125 ml butter milk
• 1-2 tsp sugar
• ½ tsp salt
• 2 eggs
• ¼ tsp black pepper
• 1 tbsp oil
• 250 ml water
• 1 tsp sugar
• 1 tsp salt