Slice the chicken breasts in half lengthwise to create thinner cutlets. Season both sides with salt and black pepper.
Heat olive oil in a large skillet over medium-high heat.
Sear the chicken for 1–2 minutes per side until lightly golden. Remove and set aside.
Add butter to the skillet. Stir in the shallot, garlic, and red pepper flakes. Cook for about 5 minutes until softened and fragrant.
Add the sun-dried tomatoes and dry orzo. Toast for 1–2 minutes while stirring frequently.
Pour in the non-alcoholic white grape juice and scrape any browned bits from the bottom of the pan.
Stir in Dijon mustard, thyme, and stock. Bring to a gentle boil.
Reduce heat to a simmer and return the chicken to the skillet.
Cover and cook for 10–15 minutes, stirring occasionally, until the orzo is tender and the chicken is fully cooked.
Remove the chicken and slice it into strips.
Stir the heavy cream, parmesan cheese, spinach, basil, and lemon juice into the orzo until creamy and smooth.
Taste and adjust seasoning if needed.
Return the sliced chicken to the skillet and arrange it on top of the Creamy Tuscan Chicken Orzo.
Garnish with additional basil and serve immediately.