Here are a few of my favorite choices, not in any particular order. Not so sure about Breakfast but here are some suggestions for lunch and dinner.

Cheescake Factory
Foot of the Hancock. They're easily found in other cities but still a good choice.

Heaven on Seven on Rush
Great Cajun! One of my favorites! Corner of Michigan and Ohio. 600 N. Michigan.

Signature Room at the 95th
Top of the Hancock. Very pricey but it's worth the splurge of the weather is clear. Fantastic views! Dinner reservations suggested.

Spiaggia
Award-winning 4-star Italian. Again pricey but the food is fantastic! 980 N. Michigan. Dinner reservations suggested.

Lawry's Prime Rib
If you like a good slab of meat this is a great choice! 100 E. Ontario, 1 block W. of Michigan near the corner of Rush.

Uno's Pizzeria
The Original! Fantastic deep dish. This is where it was invented in the 40's. 29 E. Ohio at the corner of Ohio and Wabash 2 blocks W. of Michigan.

I hope this helps, if not let me know I have a few others to offer.