In a medium sized mixing bowl, mash the banana. Add the almond milk, granulated sugar, vegetable oil, all-purpose flour, baking powder, salt and pure vanilla extract. Stir together until combined. Be careful not to overmix; a few lumps in the batter are okay.
Heat a non-stick skillet or griddle over medium heat and lightly grease with cooking oil. Once the skillet is hot, pour about 1/4 cup of pancake batter onto the skillet for each pancake.
Cook the pancakes for 2-3 minutes, or until bubbles form on the surface and the edges start to look set. Carefully flip the pancakes with a spatula and cook for an additional 1-2 minutes on the other side, or until golden brown and cooked through. Repeat the process with the remaining batter, adding more oil or vegan butter to the skillet as needed.
For the Mixed Berry Compote:In a saucepan, combine the mixed berries, granulated sugar, and lemon juice. Place the saucepan over medium heat and stir gently to combine the ingredients. Let the mixture simmer for about 6-8 minutes, stirring occasionally, until the berries soften and release their juices. You can use a spoon to gently mash some of the berries if you prefer a smoother consistency. Once the compote reaches your desired consistency, remove the saucepan from the heat and let it cool before serving.