Preheat the oven to 400°F (200°C). Line a baking sheet with parchment paper.

In a large mixing bowl, sift together the flour, baking powder, and salt.

Cut in the cold butter until the mixture resembles coarse crumbs.

Stir in the shredded cheddar cheese and gradually add the milk, mixing gently until a soft dough forms.

On a floured surface, roll out the dough to about 1/2 inch thick. Cut into circles or squares.

In another bowl, combine the lobster meat, green onions, lemon juice, and mayonnaise. Season with salt and pepper.

Place a spoonful of the lobster mixture on half of the biscuit pieces. Top with the remaining biscuit pieces and press the edges together to seal.

Bake in the preheated oven for 20-25 minutes until golden brown.