Assorted questions about cooking my chicken breasts...will they be ok do you think?

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I was thinking of marinating the breasts in olive oil, lemon juice and garlic and then wrapping them in proscuitto and baking them but I've never done it before, it's a last minute change to what I was going to cook (salmon in proscuitto) so any responses to:

Will chicken be ok with puy lentil, feta and thyme salad do you think? And how much in advance can I make this? Night before? (please say yes!)

Will it be too long if I marinate the breasts in olive oil etc the night before? Have never marinated for this long but logically only time I will have

Shall I cover the breasts with foil for the first bit or all/none of the cooking?

How long do you reckon in the oven? Will be 9 breasts in total.

TIA for any advice.

hopeful bump

Thought teh longer you marinated something the better? Cover in foil if think drying out?

proscuuitto will stop them drying out and I would chuck them in athe marinade the night before. I marindae chicken for 2 of 3 days sometimes (eg I do a load and we don't eat it straight off!!).

No foil and about 35 mins.

Actually 35 if packed together, 25 if spaced apart!!

Thanks a lot you two, I called my mum on the way home tonight and she was v helpful!