Cook the tortellini according to package instructions. Drain and set aside.
In a large skillet, heat olive oil over medium heat. Sauté shallot until soft and golden.
Add garlic and red pepper flakes. Sizzle for about 30 seconds (aka: aroma explosion). Remove from pan.
Add butter and once melted, whisk in all-purpose flour. Continue to whisk for 1-2 minutes.
Pour in milk and chicken broth. Whisk to combine and bring to a low boil.
Stir in Parmesan cheese with the salt and pepper.
Toss in sundried tomatoes, spinach and shredded chicken. Stir until spinach wilts like it saw its ex at the grocery store.
Stir until smooth and dreamy and then add a small squeeze of lemon, the cooked tortellini and gently toss to coat.
If you want a crispy topping, combine seasoned panko breadcrumbs and melted butter.. move skillet to a 350 degree oven and bake 10-15 minutes until golden brown
Serve immediately. Bask in the glory.