Place all of the ingredients into a bowl, except the raspberries, and mix until well combined. I used a spoon to mix at first and then used my hands to make sure everything was incorporated - there should be no dry bits.
Stir in the raspberries.
Place the mixture into the tin. Spread evenly and press down with your fingers or the back of the spoon.
Bake in the oven for 30-40 minutes until it starts to brown.
Let cool completely before cutting into bars.
Notes
Be sure to mix all of the ingredients together well so that there is no dry flour left. I used a spoon to start mixing and then mixed the rest with my hands to get everything really well combined.
The bars are ready to come out of the oven when the top and edges start to brown.
Let the raspberry oatmeal cool completely before cutting into bars.
These bars are quite soft when kept at room temperature. If you like your bars a little more solid, they will harden up when chilled and stored in the fridge.