* As an intern here at Midland Food Services, I appreciate the opportunity you give me to informally investigate desserts offered by major chain restaurants. (This emphasizes the speaker's role as an intern.)
* As an intern here at Midland Food Services, I appreciate the opportunity you've given me to informally investigate desserts offered by major chain restaurants. (This version adds "you've" to acknowledge the opportunity was already granted.)
* As an intern here at Midland Food Services, I appreciate the opportunity you've given me to informally investigate desserts offered by major chain restaurants. (This version uses a comma after "services" to set off the speaker's role as an intern and gives a slightly more formal tone.)
The best punctuation will depend on the context and the desired tone of the sentence.