You can use pluots in place of the plums when they're in season from May through late summer.
4 3/4 cups water, divided
6 regular-sized tea bags
1/2 cup sugar
2 1/2 cups chopped pitted red plums (about 3 plums)
3 thyme sprigs
1 red plum, thinly sliced (optional)
Lemon slices (optional)
How to Make It
Bring 4 cups water to a boil in a medium saucepan. Remove pan from heat, and add tea bags. Cover and steep 5 minutes. Remove and discard tea bags. Cool tea completely in pan.
Combine 3/4 cup water, sugar, chopped plums, and thyme in a medium saucepan. Bring to a boil, stirring until sugar melts. Reduce heat, and simmer, uncovered, 15 minutes or until plums are very tender and have lost their shape. Strain plum mixture through a sieve into tea, pressing with the back of a spoon to extract juice. Discard solids. Stir tea mixture; cover and refrigerate until thoroughly chilled.
Serve tea over ice. Garnish with plum and lemon slices, if desired.