Yes, it is of US origin. It is an idiom deriving from OED sense 9 of the word easy - conducive to ease or convenience, as in easy chair. Sense 9c makes specific reference to women's looks, but in our less gendered society I see no reason why it should not apply to males.
9c. In phrases easy to look at, easy on the eye(s), affording pleasure
to the beholder; esp. of women: comely, beautiful. colloq. (orig.
U.S.). Also in various combinations, as easy-to-make, easy-to-operate,
easy-to-use, easy-to-wear, etc.
1902 G. Ade Girl Proposition 141 He put his Tag on a blonde Canary
17 Years of Age who spelled Sure with an H and had from 7 to 9
Thoughts every 24 Hours. But she was very Easy to Look at.
1922 P. G. Wodehouse Clicking of Cuthbert x. 253 Her Highness is
the easiest thing to look at these eyes have ever seen.
1937 C. Beaton Diary 3 June in Wandering Years (1961) 310 A
pliable, easy-to-pose subject.
1937 Punch 8 Sept. 260/1 The same incorrigibly cheerful creature,
very easy to look at, very pleasant to listen to.
1938 Amer. Speech 13 205 [The dictionary] is a substantial
compilation, easy on the eyes, comparatively rich in idiomatic
1939 Vogue's Cookery Bk. i. 15 This is an easy-to-make soup for a
1943 D. E. Stevenson Two Mrs. Abbotts v. 35 Miss Walters was
certainly easy on the eye.
1949 Consumer Reports Feb. 68/2 Many prospective purchasers want
an easy-to-operate device.
1951 in M. McLuhan Mech. Bride 153/1 The same easy-to-follow
1958 Oxf. Mail 1 July 6/5 One of the good Westerns, easy on the
eye and mind, and pretty tough on the pulses.
1959 Times 9 Mar. Suppl. p. x/3 Easy-to-serve packed foods.
1959 News Chron. 10 Aug. 6/5 This hat has the soft easy-to-wear
1959 Woman's Own 20 June 52/1 (advt.) The only home perm lotion
in a tube with its own easy-to-use applicator-tip.
1960 Farmer & Stockbreeder 15 Mar. 122/1 This tough, easy-to-use,
real wood building panel.
1960 Guardian 25 Apr. 4/1 Easy-to-follow recipes.