Turn your Rolled Oats into oat flour by blending or processing them until they look like flour
Drain your Tuna
Take out a saucepan, turn your burner on Medium Heat, and add your Butter into it
Once your Butter melts add in your Minced Garlic and Mushrooms
Stir those around and let them cook for around 1 minute
Add in the rest of your ingredients aside from your Parmesan Cheese, Fettuccine, and Water
Mix everything together and continue stirring for 2-3 minutes or until it starts to thicken up
After it thicken up add in your Parmesan Cheese
Mix that in and continue stirring for around 1 minute
Reduce your heat to Low-Medium and add your Tuna in
Mix your Tuna around and let that cook for 2 minutes while stirring every :10-:15 seconds
Take your Tuna Alfredo off the heat and take out a large saucepan
Cook your Fettuccine and drain it
Add your Tuna Alfredo on top