Step 1

Place the raw chicken boneless skinless breasts on top of a cutting board and cover them with a piece of plastic wrap – this helps keep any juices from splattering. Use a meat mallet or rolling pin to pound on the thicker portion of each chicken breast. You want forceful blows that can help thin the chicken out. Once each breast is about the same thickness (roughly one-third to one-half an inch), you can stop.

Step 2

Measure out the marinade ingredients and place them into a measuring cup or medium bowl. You'll need to open the canned pineapple rings to get the pineapple juice out of it - place the can of pineapple rings in the fridge when you've drained enough juice. Use a small whisk to mix until thoroughly combined. Set the marinade aside.

Step 3

Place the flattened raw chicken breasts in a sealable plastic bag. Pour the marinade in, then press the air out of the plastic bag as best you can. Seal the bag then gently squish everything together with your hands to help cover the chicken with the marinade. Place the marinating chicken in the fridge for 40 minutes.

Step 4

After the 40 minutes are up, remove the bag with the chicken breasts from the fridge and place it on the counter to warm slightly for 10 minutes. After those 10 minutes, open the bag and pour the used marinade into a small saucepan, holding onto the marinated chicken breasts so they stay in the bag. Reseal the bag and let it warm for another 10 minutes on the counter.

Step 5

While the chicken finishes warming slightly, turn the used marinade into a glaze. Set the saucepan with the marinade in it on the stove and turn the burner to high heat. Let the marinade come to a boil, reduce the heat to medium-low, and let it cook at a low boil for at least 5 minutes while stirring it often with a small whisk to prevent burning. It should be starting to thicken but not so thick that it resembles the consistency of a caramel sauce. Remove it from the burner when done and set aside.

Step 6

Once the glaze is made it's time to preheat your grill. Turn your grill on to a medium heat and let it get to a temperature of around 375 to 400 degrees F. After it's reached temperature, use a pair of tongs to remove each chicken breast from the bag and place them on the grill grates. Close the lid and let the breasts cook for 5 minutes. You can discard the bag the chicken was in.

Step 7

While the chicken is cooking, prep the pineapple slices. Prep a bowl or large container with paper towels. Drain the remaining juice in the can of pineapple slices and place the slices on top of the paper towels. Remove the excess liquid as best you can, then discard the paper towels. Pour 0.5 tbsp of oil onto the pineapple rings and spread it around onto the rings with your hands to coat them as best you can.

Step 8

When the chicken breasts have cooked for 5 minutes on the grill, open the lid and add the pineapple slices onto the grill. Then flip the chicken breast over with a pair of tongs and use a basting brush to spread the glaze you made onto the surface of each chicken breast. You may not use all the glaze and that’s fine.

Step 9

Close the lid and continue cooking the chicken breasts and pineapple. Open the lid after 5 minutes and flip the pineapple slices over using tongs. Check the internal temperature of the chicken breasts at this point - you want to remove them once they reach an internal temp of 165 degrees F. They may need another 3 to 5 minutes.

Step 10

Once the breasts are done cooking, open the grill lid and use tongs to remove the meat from the grill. Let the pineapple slices cook another 5 minutes, (for a total of 5 minutes on each side), then remove them from the grill. Set the chicken breasts on a platter or cutting board and let them rest for 5 to 10 minutes, then slice and serve them with the grilled pineapple! You can also brush on a little additional of the reserved marinade if desired.