- 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