In a large bowl, stir the oats and chia seeds together and fill with water until completely covered. Stir in the lemon juice, and allow the oats to sit for at least 3 hours, covered (you can leave them overnight). When the oats are done soaking, use a fine-mesh colander or cheesecloth to drain out as much water as possible, and then return the oats to the large bowl.
Preheat the oven to 350 degrees. Grease a 9 x 13 baking dish (or put liners in a muffin tin).
In a medium sized bowl, whisk together the coconut oil, coconut milk, maple syrup, pumpkin, salt, baking soda, vanilla and spices. Add this mixture to the oats and stir thoroughly. Then fold in the raisins and pecans, and pour the mixture into the prepared baking dish.
Bake for 35-40 minutes, until the center is firm to the touch (25 minutes for muffins). Allow to cool, and then cut into squares and store in the fridge in a sealed container.
The squares are fabulous when warmed slightly. If you’d like them a bit sweeter, you can dust them with a bit of powdered sugar.