Season the vegan chicken with the poultry seasoning.
Place a saute pan over medium-high heat, add the olive oil, and once hot, add the chicken and cook for 3 minutes. Set aside.
Bring a saucepan of water to a boil and place a steam basket on top.
Drop broccoli into the steam basket, cover with a lid and cook for 3 minutes.
Drain and rinse the broccoli under cold water until completely cooled down. Set aside.
In a high-powered blender, add the cashews, milk, lemon juice, apple cider vinegar, nutritional yeast, garlic powder, onion powder, salt, pepper, and 1 cup of the shredded cheddar. Blend on high until extremely smooth.
Pour the cheesy sauce into a bowl and add in the other 1 cup of shredded cheddar, the chicken, and the broccoli. Stir well and place into the refrigerator to chill for at least 1 hour to thicken.