To make jam:

1. Add fresh blackberries and maple syrup or honey to medium saucepan over medium heat. Stir occasionally to combine and prevent sticking. As blackberries cook, use a spoon and muddle to gently break down cooked berries.

2. Mash up berries less for a chunkier jam. Once blackberries are broken down and rapidly bubbling, reduce heat to low and stir in chia seeds, lemon juice and cinnamon (if using). Cook jam for an additional 10 minutes, stirring frequently. Jam should thicken and become glossy as chia seeds absorb remaining liquid.

3. Remove saucepan from heat and allow jam to cool to room temperature. Adjust sweetness as needed with additional maple syrup or honey. Transfer to container and store in refrigerator up to 1 week.

To make grilled cheese sandwich:

4. Heat pan over medium-low heat. Add 1 tablespoon butter to coat pan evenly.

5. Generously spread one side of each bread slice with butter. Place one slice, buttered-side-down into pan to toast. Spoon 2 tablespoons blackberry chia jam onto unbuttered side of bread in pan.

6. Add 2 cheese slices on top of jam, then top with the second bread slice, buttered side facing out. Once cheese is halfway melted, flip sandwich onto other side, pressing down lightly to encourage melting. When desired toastiness and cheese melt is achieved, slide off of pan and cool slightly before eating. Repeat to make the other sandwich.