Step 1

Preheat the oven to 350 degrees.

Step 2

Make crumb topping by combining 3 ingredients and mixing with fork, just till combined. You want to have this in clumps. Set aside.

Step 3

In a medium mixing bowl, beat egg.

Step 4

Whisk in sugar, vanilla & melted butter, baking powder and salt.

Step 5

Gradually add in milk, slowly mixing through with whisk

Step 6

Add in zest, 1/8 teaspoon cinnamon, a few grated of the nutmeg

Step 7

Stir in flour, mixture will be a bit lumpy, use whisk to break up big pieces, but do not over mix

Step 8

Pour batter into a greased parchment lined 8x12 pan

Step 9

Place blueberries over the batter

Step 10

Put the crumb mixture over the top

Step 11

Sprinkle with 1/8 teaspoon cinnamon, & a few zests of lemon

Step 12

Bake in center of oven for 40-5 minutes, turning half way through

Step 13

Allow to sit for 5-10 minutes before cutting