Step 1
Step 1
Bring a pot of salted water to a boil and cook the Fusilli Barilla according to packet instructions, until al dente. Drain and remove from the heat.
Step 2
Step 2
Meanwhile, heat a skillet until just hot. Add the butter and heat until bubbling, then stir in the potato starch and cook for 1-2 minutes until thickened.
Step 3
Step 3
Whisk in the milk and cook for another 1-2 minutes until just thickened.
Step 4
Step 4
Add the grated cheese and stir continuously over a low heat until the cheese is completely melted, giving a smooth and creamy fondue. Turn off the heat and set the fondue aside.
Step 5
Step 5
Tip the cooked pasta into a large bowl and toss with the Pesto Barilla alla Genovese until coated.
Step 6
Step 6
Divide the fondue between serving bowls, then top with the pesto pasta.
Step 7
Step 7
Scatter the sliced mushrooms over the top and serve immediately.