Place baking soda and lemon juice into the pot. Stir until dissolved. Add water and dry pasta, stirring to incorporate.
Program the Duet for combo cooking: Press “COMBO COOK”. “pressure cook” will be displayed. Press “PRESSURE” to select low pressure. “low” will be displayed. Press “TIME”. Using the “START/PAUSE” dial, set time to 0.
Press “COMBO COOK” a second time. “air fry” will be displayed. Set temperature to 360°F. Press “TIME” and set for 7 minutes. Now the recipe is set and ready to cook.
Place on Duet Pressure Cooker Lid. Make sure the pressure release valve is in the “CLOSE” position.
Press “START/PAUSE” to begin pressure cooking.
When done, allow pressure to natural release for 10 minutes. After 10 minutes, quick release remaining pressure by moving the pressure release valve to the “OPEN” position.
Carefully remove Pressure Cooker Lid when Duet has finished releasing all pressure.
Add remaining ingredients, except bread crumbs and butter, to the pot. Stir well to melt cheese and ensure all ingredients are combined.
In a bowl, stir together bread crumbs and melted butter. Cover mac and cheese evenly with the bread crumb mixture.
Place on Duet air fry lid. Select “START/PAUSE” to air fry for 7 minutes. When done, serve immediately.