Bring a large pot of salted water to a boil and cook the Brami pasta according to the package instructions, usually about 7 to 9 minutes.
While the pasta is cooking, season the chicken breast on both sides with sea salt and black pepper.
Heat the avocado oil in a large skillet over medium-high heat.
Add the chicken to the skillet and sear for 5 to 6 minutes per side, or until the internal temperature reaches 165°F.
Remove the chicken from the pan and let it rest for a few minutes before slicing it into thin strips.
In the same skillet, add the halved cherry tomatoes and sauté for 2 minutes until they just begin to soften and blister.
Drain the pasta, reserving about 2 tablespoons of the cooking water.
Add the cooked pasta, sliced chicken, baby spinach, and basil pesto to the skillet with the tomatoes.
Toss everything together over low heat with the reserved pasta water and lemon juice until the spinach is wilted and the sauce is glossy.