Human: Can you tell me the steps to make homemade grape jelly? Assistant: 

1. Start by washing 1lb of grapes and removing them from the stems.
2. Place the grapes into a large saucepan and cover with 2-3 cups of water.
3. Bring the water and grapes to a boil and let the mixture simmer for 10-15 minutes.
4. Strain the mixture through a fine mesh strainer so that only the juice remains.
5. Once strained, measure the amount of juice and pour it back into the saucepan.
6. For each cup of juice, add ½ cup of sugar and begin to heat the mixture over medium heat.
7. Simmer the mixture for about 10-15 minutes, stirring often, until sugar is fully dissolved.
8. Raise the heat and let the mixture come to a boil.
9. Boil the mixture for 1-2 minutes and then remove from heat.
10. Add in 1 tablespoon of lemon juice and stir the mixture until combined.
11. Pour the jelly into clean jars and press down a layer of plastic wrap on top.
12. Seal the lids and let cool before serving.